Free-Space to Fiber Coupling of Electromagnetic Gaussian Schell-Model Beams in Turbulent Marine Atmospheric Channel

Yu, Lin; Zhang, Yixin

doi:10.1109/jphot.2018.2874270

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Thus, it is important and necessary to investigate the propagation properties of array beam under the atmospheric and oceanic turbulence. Up to now, many works have been carried out on the propagation properties of laser array beams propagating through atmospheric and oceanic turbulence [13]- [26]. Besides, it has been found that laser beams with low coherence can suffer from smaller intensity fluctuations under influence of atmospheric turbulence [27], [28], which can improve the performance of communication systems.…”

Section: Introductionmentioning

confidence: 99%

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

et al. 2020

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The effects of the jet engine turbulence on a Gaussian Schell-Model (GSM) beam array propagating in a jet engine plume are studied theoretically. The analytical expressions of the cross-spectral density (CSD) function, the spectral degree of coherence (DOC) and the mean-squared beam width for a GSM beam array propagating through a jet engine plume region are derived based on the extended Huyens-Fresnel integral. It is found that the profile of spectral density and the DOC of a GSM beam array gradually transfer to an elliptical shape as the propagation distance increases, and the elliptical degree becomes greater with increasing source coherence length. Besides, as the source coherence length decreases, the effect of the jet engine turbulence on the beam broadening is smaller and the profile of the DOC appears sidelobes at short distance. It is also found that the values of effective coherence width nearly remain the same for different values of source coherence length after propagating a certain distance. Furthermore, the effects of the number of beamlets on the beam width and effective coherence width are investigated in detail.

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Section: Introductionmentioning

confidence: 99%

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

et al. 2020

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“…The basic model for coupling was established and the coupling efficiencies of different beams were analyzed, such as plane wave and Gaussian beam [2]- [4]. The coherence and polarization of beam source were also considered in coupling [5]. Given that atmospheric turbulence causes the distortion of free-space beams, its effects on coupling and mitigation ways attract attention.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Coupling of Vortex Beam Into Parabolic Fiber in Turbulent Atmosphere

Zhang

2019

IEEE Photonics J.

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Aiming at the demand for high-capacity wireless-fiber link, the coupling efficiency of Laguerre Gaussian (LG) vortex beam into parabolic fiber under atmospheric turbulence is first investigated. The coupling model is established based on vortex mode analysis in free space and fiber. Effects of turbulence on coupling efficiency are analyzed, from which the way for system optimization is proposed to mitigate the efficiency decline. We find that LG beam with small OAM number, low radial index and long wavelength is able to achieve higher coupling efficiency in turbulent atmospheric conditions. As for the transmitting beam waist of LG beam or the focal length of receiving lens, there exist optimal values to realize size matching between spatial and fiber modes for coupling. The results are beneficial to the design of coupling system.

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Enhanced fiber-coupling efficiency via high-order partially coherent flat-topped beams for free-space optical communications

et al. 2022

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The fiber-coupling efficiency of signal beams is crucial in free space optical (FSO) communications. Herein, we derived an analytical expression for the fiber-coupling efficiency of partially coherent flat-topped beams propagating through atmospheric turbulence based on the cross-spectral density function. Our numerical calculation results showed that the fiber-coupling efficiency of partially coherent flat-topped beams in a turbulent atmosphere could be enhanced by increasing the beam order. Under the same conditions, the fiber-coupling efficiency of the high-order partially coherent flat-topped beams was larger than those connected to the Gaussian and Gaussian Schell-model (GSM) beams. Our results will improve the quality of partially coherent beams used in FSO communications.

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Free-Space to Fiber Coupling of Electromagnetic Gaussian Schell-Model Beams in Turbulent Marine Atmospheric Channel

Cited by 4 publications

References 19 publications

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

Investigation on the Coupling of Vortex Beam Into Parabolic Fiber in Turbulent Atmosphere

Enhanced fiber-coupling efficiency via high-order partially coherent flat-topped beams for free-space optical communications

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